Engine truck



Feb. 17, 1931.

E. SHANNON 4 Sheets-Sheet 1 Eve/22$;

Feb. 17, 1931. H Q 1,793,338

ENGINE TRUCK Filed June 18, 1950 {LSheets-Sheetl Feb. 17, 1931.

M.- sHANNoN ENGINE TRUCK Filed June 18, 1930 4 Sheets-Sheet 4 OIIIIlI/IIl/l/I/III/ heizzjf f JUNITED S A Patented Feb. 17, 1931 ELLWOOD m. smnon, or BALA, rmmsxnvmra ENGINE TRUCK Application filed June 1 8,

One object of this invention is to provide a very flexible and easy-riding four-wheel. locomotive truck with a low center plate and side frames.

A further object of the invention is: to

ualize the truck at each corner, and to provide semi-elliptic springs for cross equalizing.

In the accompanying drawings Fig. '1 is a side view, partly in section, of my improved locomotive truck;

Fig. 2 is a longitudinal sectional view on the line 22, Fig. 3;

Fig. 3 is a plan view; Fig. 4 is a transverse sectional view on the line 4- -4, Fig. 1;

. Fig. 5 is a transverse sectional view on the line 5 5, Fig. 1;

Fig. 6 is a transverse sectional view on the line 66, Fig. 1;

Fig. 7 is a sectional plan view onthe line 7-7, Fig. 2;

Fig. 8 is a perspective view of one of the fillers for the suspension links;

Fig. 9 is a longitudinal sectional view of a l modification of the axle box;

Fig. 10 is a sectional view on the line 10-10, Fig.9;

Fig. 11 is a transverse sectional view of another 'form of axle box on the line 1111, Fig. 12; and Fig. 12 is an end view of the axle box on the line 12-12, Fig. 11."

1 is the frame of the'truck made as an integral casting and consisting of a rectangular central member having an open. center, in which is. located the swing bolster'2. 3 are the side members of the rectangular central section, connected together by trans verse members 4 and a centii'al transverse member or transom '5', which is epressed, and over which extends the bolster 2. Projecting from each corner of the rectangular central section are extensions 6, each of which consists of two arms spaced apart and connected by pedestal members 7. Mounted between the pedestal v sectionsof each extension is a journal box 9, and as shown in Figs..1, 2 and 6 the journal boxes are tubular and extend from one side of the truck to the other. and in the enlarged portions 10 are roller'bear- 1930. Serial m. 462.011.

ings 11 of any suitable type, held against I shoulders 12by cap plates 13. The outer raceway 13b of the roller-bearings is held in place against the said shoulders 12 by the Q this instance are tapered but it will be under- 19, forming an integral part of the extensions 6, and mounted onthe links below these spring seats are coil springs 20, which are carried by spring seats 21, hung from 'the links. On the ends of the links are nuts by which the spring seats 21 and springs 20 can be adjusted. These springs take care of local shocks at the axles.

As stated above, the central transverse member 5 is depressed as shown in Figs. 1,

2 and 5,.an d is made hollow as shown incrosssection, Flg. 2, and this member acts as a uide. for the bolster 2. The bolster has a ody portion 22, from which depends memis a center bearing 28 having a center pin opening 29 of the usual form. Mounted under each end of the body portion 22 are semi-elliptic springs 30. ,The ends of these springs rest on spring seats 31 carried by links 32 hung from the side members 3 of the truck frame. A Extending under the springs is a safety support 33, through which extend carrying bolts 34, which also pass through lugs depending from the portions 23 of the bolster. The ends of this safety support extend under the center of the springs and should the springs for any reason fail, then the supports carry the springs. The links 32 are spaced apart by the springs a casting having extensions forming the jour-' -nal box support, and these journal boxes may at the lower ends and at the upper ends by fillers 35, being secured to the fillers by bolts 36. The form of the fillers is shown in Fig. 8. The two depending portions 37 of each filler are rounded at their lower ends and fit on each side of the bearing block 38, Fig. 4. The bearing blocks are secured to the frame of the truck by rivets or other suitable fastenings. This construction forms what is termed a threef-point suspension type of linkage. The construction of the two-point bearings at the upper portion'of the links provides a Very compact and strong arrangement. The links 32 pass through slots 39 in the web 40 of the side members 3. This permits the links to swing laterally the required distance when the truck passes around a curve.

While in the main figures of the drawings have shown journal boxes of a particular type havin roller-bearings, and as shown in Fig. 6 the ournal boxes enclose the shaft so that the journal boxes can be filled with lubricant, in Figs. 9 and 10 a modification is illustrated in which are independent boxes 10a for each end of the axle 15a, and in these boxes are bearings of the hexagonal type, while in Figs. 11 and 12 a floatin bushing 41 is shown, which revolves in t e fixe 42 incorporated in the journal box 43. The bushing 1:1v rotates independently of the shaft 15?).

By the above construction, it will be seen that the truck frame is made as an integral be of any of the styles mentioned above. By using the fillers for supporting the swing links, these links ay be used either in the particular truck an integral or built-up frame, as there is an equalizer at each corner of the truck, and in addition two semi-elliptic springs providing cross equalizing. By making the transverse member 5, which is in fact a transom, in the mannershown', it not only guides the lateral motion of the spring bolster but also acts as a safety member" in case of the breaking of the semi-ellipticsprings, and it transmits to the truck the longitudlnal forces of the locomotive, acting through the bolster.

I claim:

1. In combination in a truck, of a main frame made as an integral casting, and con.-

. sisting of a rectangular central member havving an open center, and having extensions projecting from each corner of thesaid center; two cross semi-elliptic springs; links sus pending the springs from the side members of the rectangular center portion of the truck a bolster supported by said springs; pedestals formedintegral with the end extensions; journal boxes located in the space'between the pedestals; and independent spring equal izers supporting the frame at the journal;

boxes.

bushing own or any truck' having 2. The combination in a truck, of a frame made as an integral casting and consisting of a central rectangular section, open at the cen-.

forming journal box guides; journal boxes located between the pedestals of each extension; equalizing beams resting on each journal box; links suspended from the beams; springs carried'by the links and bearing against the frame; transverse semi-elliptic springs suspended from the central portion of the frame; and a bolster mounted on the semi-elliptic springs.

3. The combination in a truck,'of an integral framehavin a rectangular open central portion and 3X1890X extensionsat each corner of the frame, also made as an integral part of the frame, each axle box extension consisting of two arms spaced apart; pedestals connecting the arms and forming the bearings for journal boxes; a depressed central transverse transom; a bolster mounted above the transom and having a center bearing, and also having depending portions extending on eachside of the transom; semielliptic springs npon which the bolster rests; and links suspending the springs from the side members of the frame of the truck.

4. The combination in a truck, of a frame having a rectangular open central member with an open center and axle box extensionsv at each corner of the center member; axle boxes-mounted in the extensions; a depressed transom extendin'g from one side member to the other at the center 'of the truck; a bolster mounted above the transom and carryin the center bearing of the truck, said bolster aving depending portions extending on each side of the transom; transversely arranged semi-elliptic springs carrying the bolster;

bearing blocks on the side members of the frame; slotsin the frame on each side of the bearing blocks; a filler straddling each bearing block; links secured to the filler and extending through the slots in the frame; and

spring supports at the lower ends of the linkson which the semi-elliptic springs rest.

- 5. A sprin suspension for trucks, consisting of a bloc arranged to be secured to the frame of the truck, s'aid block having a raised portion at the center; a filler spanning the 1 blocks; and links secured to each side of the filler and arranged to carry the ends of a spring. v s t r 6. The combination in a truck, of a frame made as an integral casting, and consisting of a rectangular'center member having an open center and having axle box extensions at each corner; axle boxes mounted in the extensions and a local equalizing mechanism at each box; a depressed transom extending from one side member of the truck to the other and made integral therewith; asemiing portions elliptic sprin on each side of the transomlinks sus wing the rings from the side frames 0 the truck; a. ulster carried by the" springs and having dependin ,tfilortions extending between the sprmgs an e transom; and a safety sugport carried by the dependthe bolster and extending under the semi- 'ptie springs. i

ELLWOOD M. SHANNON. 

